Chemistry For Today: General, Organic, And Biochemistry, Loose-leaf Version
9th Edition
ISBN: 9781305968707
Author: Spencer L. Seager
Publisher: Brooks Cole
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Chapter 19, Problem 19.26E
Explain why a protein is least soluble in an aqueous medium that has a pH equal to the isoelectric point of the protein.
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Chapter 19 Solutions
Chemistry For Today: General, Organic, And Biochemistry, Loose-leaf Version
Ch. 19 - Draw the structure of hexanoic acid. Label the...Ch. 19 - What functional groups are found in all amino...Ch. 19 - Identify the R group of the side chain in the...Ch. 19 - Prob. 19.4ECh. 19 - Draw structural formulas for the following amino...Ch. 19 - Prob. 19.6ECh. 19 - Draw Fisher projections representing the D and L...Ch. 19 - Draw Fisher projections representing the D and L...Ch. 19 - Prob. 19.9ECh. 19 - What characteristics indicate that amino acids...
Ch. 19 - Prob. 19.11ECh. 19 - Write structural formulas to show the form the...Ch. 19 - Write structural formulas to show the form of the...Ch. 19 - Write ionic equations to show how serine acts as a...Ch. 19 - Write two reactions to represent the formation of...Ch. 19 - Write a complete structural formula and an...Ch. 19 - Write a complete structural formula and an...Ch. 19 - Prob. 19.18ECh. 19 - Write abbreviated formulas for the six isomeric...Ch. 19 - Prob. 19.20ECh. 19 - How many tripeptide isomers that contain one...Ch. 19 - What special role does the amino acid cysteine...Ch. 19 - Prob. 19.23ECh. 19 - Explain why the presence of certain proteins in...Ch. 19 - Prob. 19.25ECh. 19 - Explain why a protein is least soluble in an...Ch. 19 - Prob. 19.27ECh. 19 - Prob. 19.28ECh. 19 - Classify each of the following proteins into one...Ch. 19 - For each of the following two proteins listed in...Ch. 19 - Prob. 19.31ECh. 19 - Differentiate between simple and conjugate...Ch. 19 - Give one example of a conjugated protein that...Ch. 19 - Prob. 19.34ECh. 19 - Prob. 19.35ECh. 19 - Write the structure for a protein backbone. Make...Ch. 19 - Prob. 19.37ECh. 19 - Prob. 19.38ECh. 19 - Prob. 19.39ECh. 19 - Prob. 19.40ECh. 19 - Which amino acids have side-chain groups that can...Ch. 19 - Prob. 19.42ECh. 19 - Prob. 19.43ECh. 19 - A globular protein in aqueous surroundings...Ch. 19 - What is meant by the term quaternary protein...Ch. 19 - What types of forces give rise to quaternary...Ch. 19 - Describe the quaternary protein structure of...Ch. 19 - Prob. 19.48ECh. 19 - Prob. 19.49ECh. 19 - Prob. 19.50ECh. 19 - As fish is cooked, the tissue changes from a soft...Ch. 19 - Prob. 19.52ECh. 19 - Prob. 19.53ECh. 19 - Once cooked, egg whites remain in a solid form....Ch. 19 - Prob. 19.55ECh. 19 - Prob. 19.56ECh. 19 - A protein has a molecular weight of about 12,000u....Ch. 19 - Which amino acids could be referred to as...Ch. 19 - Prob. 19.59ECh. 19 - Prob. 19.60ECh. 19 - Prob. 19.61ECh. 19 - Some researchers feel that the high experienced by...Ch. 19 - Prob. 19.63ECh. 19 - Prob. 19.64ECh. 19 - Prob. 19.65ECh. 19 - Prob. 19.66ECh. 19 - Why must the protein drug insulin be given by...Ch. 19 - Prob. 19.68ECh. 19 - Prob. 19.69ECh. 19 - Prob. 19.70ECh. 19 - Prob. 19.71ECh. 19 - What functional groups are found in all amino...Ch. 19 - Which of the following are true concerning the...Ch. 19 - Rank the following components of hemoglobin in...Ch. 19 - Describe the quaternary protein structure of...Ch. 19 - Complete degradation of a protein into individual...Ch. 19 - Which is NOT a characteristic of proteins? a. They...Ch. 19 - Which of the following describes the primary...
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- 22-45 Proteins are least soluble at their isoelectric points. What would happen to a protein precipitated at its isoelectric point if a few drops of dilute HCl were added?arrow_forwardFor the tripeptide AlaValGly which amino acid residues, if any, a. are hydrophilic b. are hydrophobic c. possess nonpolar R groups d. participate in two amide linkagesarrow_forwardFor the tripeptide SerArgIle which amino acid residues a. are hydrophilic b. are hydrophobic c. possess polar neutral R groups d. participate in two amide linkagesarrow_forward
- 22-44 How can a protein act as a buffer?arrow_forward22-49 Based on your knowledge of the chemical properties of amino acid side chains, suggest a substitution for leucine in the primary structure of a protein that would probably not change the character of the protein very much.arrow_forward22-62 Distinguish between intermolecular and intramolecular hydrogen bonding between backbone groups. Where in protein structures do you find one, and where do you find the other?arrow_forward
- . How many unique amino acid sequences are possible for a tripeptide containing only the amino acids gly, ala, and cys, with each amino acid occurring only once in each molecule?arrow_forwardWhich of the following describes the primary structure of proteins? a. The collective shape assumed by all of the chains in a protein containing multiple chains. b. The folding of an individual protein molecule. c. The regular repeated shape of the protein molecules backbone. d. The sequence of amino acids bonded together by peptide bonds.arrow_forwardDraw a segment of the backbone of a protein that is long enough for three peptide linkages to be present.arrow_forward
- In a pleated sheet secondary structure for a protein a. describe the general shape of the protein backbone b. describe the general locations for the amino acid R groupsarrow_forwardWhat functional groups are found in all amino acids? How many different amino acids are found in naturally occurring proteins?arrow_forwardConsider the tripeptide leucylvalyltryptophan. a. Specify its structure using three-letter symbols for the amino acids. b. How many peptide bonds are present within the peptide? c. Which of the amino acid residues has the largest R group? d. Which of the amino acid residues, if any, has a basic side chain?arrow_forward
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